Removable tire for car-wheels.



T. G. AULTMAN. REMOVABLE TIRE FOB GEE WHEELS.

Patented Mar 1909.

APPLICATION FILED APR. 3. 190B.

I hZim vez'zgoz wheel section. 1

' tion of the wheel being such that it may be THOMAS G. AULTMAN, OF FAIRMONT, WEST VIRGINIA.

anmo'vaste arms sea cans-rails.

apeciflcation of Letters Patent.

Eatente'd March 2, 1909'.

Application filed April a, 19cc. s rainaazaeee;

To all whom it may concern: I

Be it known that I, flnonas G. AULTMAN, a citizen of the United States, residing at Fairmont, in the county of Marion and State of West Virginia, have invented new and useful Improvements in Removable Tires for Car-Wheels, of which the following is a speciiication.

My present invention relates to improvements in flanged wheels of the character used on railways, and it has for its object to provide an improved wheel of this character wherein the tire is removably or detachably mounted on the central section or core, the construcmade cheaply, and in use, the tire is properly positioned and effectually secured upon the central wheel section, the periphery of the central section of the wheel and the internal bore of the tire having surfaces preferably parallel to the axis of the wheel, and a series of wedges being interposed between the tire and central section and provided with bolts for expanding them between the parts to secure the necessary locking action, a flange orshoul derlon one part fitting into a recess on the other part in order to position the tire properly in the plane of the central To these and other ends, the invention consists in certain improvements, and combinations and arrangements of parts, all as will be hereinafter more fully described, the novel features being )ointed out particularly in the claims at tlre end of the specification.

In the accompanying drawing: Figure 1 represents a sectional view of a earwheel constructed in accordance with my present invention; Fig, 2 represents a side elevation of a portion of the wheel shown in Fig. 1, viewing the latter from the right; Fig. 3 is an elevation of a portion of the wheel as viewed from the left in Fig. 1 Fig. 4 is a peri spective view of one of the locking wedges; and Figs. 5 and 6 are detail views of different kinds of locking Wed es which may be used.

Similar parts are iesignated by the same reference characters in the several views.

Wheels constructed in accordance with 1 my present invention may be adapted for 1' use on railway cars of various kinds, or they i may be used on locomotives, and it is to be understood, of course, that in" adapting the wheel to these difierent uses. certain changes or modifications may he made in the proportions of the parts and in the detail construction'thereoi'.

I have shown in the accompanying draw the Wheel comprises a core or central section 1 adapted to fit the axleand having a peripheral surface 2 which is cylindrical so as to lie in a plane parallel to the axis of the wheel.

This core may be made of cast me er, is provided with a tire 3 which is form arately therefrom and may he made or other metal having the desired wearing qualities. This tire is provided with an internal bore or surface 4 which is also cylinand it .drical so as to lie in a plane parallel to the axis of the wheel and it is of the same diameter as the central section so as to fit thereon. One edge oi the tire, the outer edge in; the present instance, is provided with an internal flange or shoulder 5 which enters a recess. formed inthe corresponding edge of the core and it abuts against a circumferential shoulder 6 of the core so that when the tire is completely applied to the core, the tire will be properly positioned in the plane of rotation of the core section, the position of the wheel flange will be determined and fixed to correspond with the gage at all times, so that the rims and central sections constitute an interchangeable system, and the axial thrust of the tire r zceived from the rail flange 7 will he sustained. These cooperating shoulders of the tire'and core section may, however. be

arranged at the inner edges of these parts as ing one embodiment of the invention wherein B0 will be obvious, although it isgenerally preferable to arrange them in the relation shown.

The tire is looked upon the core or central section by devices which exert an expansive action between them, a set of Wedges 9 being employed in the present instance which are spaced at suitable distances around the periphery of the core section and fit in recesses 10 formed therein. The outer sides of these wedgesare parallel to the ,axis of the wheel and bear against the internal bore of the tire, and the inner ethics of the wedges are tapered relatively do the axisof the wheel and are slidable on courcspondingly tapered hottom surfaces 1 1 formed in the respective recesses. in tho prescntinstance, the wedges reduced toward the internal flange or shoulder of the tire, and when the wedges are in fully-locked osition, they prefers ly do not uitereach t 's flange or shoulder. Any

' 5 suita le means may be employed foijdrawing the wedges into locking position so as to exd the tire and thus center and lock it on v a: central section of the wheel. In the resent instance, a bolt 12 is extended through each wedge, the bolt being anchored to the wed e in a suitable manner such as by means oft e head 13 arranged at one side of the wheel, and the opposite end or" the bolt thre'adedto receive a tighteni nut 14, the 5 latter acting on the adjacent si es of the tire and central sectii n respectively to draw the wedge into locked position. he inner and outer faces of the tire and core section prelerably lie in arallel planes perpendicular to o the axis of the wheel, and may be flush, as shown. These wedges sup ort the weight imposed upon the tire by t e central wheel section, and they may be supplied ofsuch width and number as may be desired. in

5 the present instance, a s ring washer i5 is provided which overlaps t e tire and central wheel section, and the expansive properties of this washer serve to prevent loosening of the nut and wedge by reason of vibration or o because of the unequal expansion between the tire and core due to the heat generated upon the tire, the elastic washer serving to draw the wedges "tight should the tire expand more rapidly than the core section. 5 By making the peripheral surface of the central or core section and the internal bore of the'tire of cylindrical form, so as to lie in planes parallel to the axis of the wheel, the turning or boring o erations on these parts are materially simp died and cheapened, the necessity of tui rig these parts on tapers wherein accuracy of fit and angle is required, bein thereby avoided, and by interposing the locking wedges between the tire and central section and roviding bolts for shifting the wedges in irections parallel to the axis of the wheel, an accurate centering and locking of the tire with respect to the central section are insured. Moreover, by pro- 0 viding one of the papts, preferably the tire,

with a flange, or shoalder which enters a recess and engages a correspondin shoulder 'on the other part, the tire-is firm y and accuratel positioned soas to rotate in a lane at precise y perpendicular to the axis 0 4 the wheel, the position of the wheel flange is accurately positioned-so as to corihhpond with the track gage, and the axial thrust in one direction is sustained thereby, the 0 Wedges and their 006 crating bolts serving to sustain the axial t rust in the opposite direction. I

In Figs. fiend 6, I have illustrated wed es somewhat dlfierent' from that'shown in F ig {1 and which may be used in placelfiiereof, the wedge shown in Fig. 6 having agr oove or channel 16 at one side to receive the fastening bolt, while in the wedge shown in Fig. 5, a tang or bolt 17 is formed integrally at one end of the wedge, a nut 18 cooperating with said tang or bolt to draw the wedge tight and lock it.

I claim as my invention:

1. it ahcel comprising a core section, a

tire section reniovably. fitted thereon, the cooperating inner and outer surfaces of said partsbcing parallel to the axis of the wheel, and a series of locking wedges interposed between the tire and core section and arranged within the said-inner surface of the tire section, the wedges being operable to lock the tire thereon 2. A wheel comprising a core section having circiunferentially spaced recesses in its periphery, a tire having a continuous internal surface parallel to the axis of the wheehand a series of wedges inserted in said recesses between the core section and tire and oer-able to lock the tire in position.

3. 1 wheel comprising a core section and a tire rcmovably fitted thereon, the co-.

operating inner and outer surfaces of the tire and core sections res iectlvely being parallel to the axis of the w eel, one of said parts having at one side an annular shoulder adapted to enter a corresponding recess in the other part to position said tire with respect to the plane of rotation of the wheel,

and a series of wedges inserted fromthe opposite side of the wheel relatively to said s oulder and between the tire and core section for locking the tire thereon.

4. A wheel comprisin a core section having a periphery paralle to the axis of the wheel, a tire reniovably fitted-on the core section and also having an internalsurface arallel to the of the wheel, said parts aving cooperating shoulders at one side of the wheel to position the tire with respect to the plane. of rotation, and a series of circumferentially spaced wedges inter osed between the core section and tire am movable toward said shoulders in tightening for locking the tire in position.

5. A wheel comprising a core section, a tire removably fitted thereon, a series or wedges interposed between the core section and tire for locking the latter in position, and means cooperating with said wedges for automatically tightening thesame upon the expansion or loosening of the tire.

6. A wheel comprising a core section provided with a series of circumferentially pipaced tapering recesses, a tire detachably tting said core section, 006 crating circumferentially extending shou ders on the core section and tire for preventing relative axial movement in one direction, a series of wedges insefiz-ed in said masses and so my hm"; uoemt'mg with the inner sircumfereme of Wits t a tire, rind bolts copemting with saicl wedges and provideci wrsh spmng washers 5 for aummatically tightening the Wedges upon Wit-messea the expansion 01 icoseuing of the tire. 3. B

In testimony whm-eof I have hereunto set F? x-wzmz. 

